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Z-Score & Percentile Calculator
Convert a value to a z-score and percentile using the mean and standard deviation, for test scores and data analysis.
Tip from Tink: A z-score of 2 puts you above about 97.7% of values.
Z-score
1.5
Percentile
93.32%
Above this value
6.68%
Two-tailed p
0.1336
Assumes the data follows a normal (bell curve) distribution.
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How to use the Z-Score & Percentile Calculator
- Enter the value, mean and standard deviation.
- Read the z-score and percentile.
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